Mining-machine.



G. E. DAVIS. MINING MAGHINE. APPLICATION FILED OCT. 6, 1910.

Patented Bed 15, 1914.

6 SHEETS-SHEET 1.

II I HI I'll OOOOOOOOGOOOOOO THE NORRIS PETERS cq, Pl-lo'ro-Llrna. wASHlNGroN, D. c.

G. E. DAVIS.

MINING MACHINE.

APPLICATION FILED OUT. 6. 1910.

Patented Dec. 15, 1914.

6 SHEETS-SHEET 2 aw H Th HI I ITI THE NORRIS PETERS 00.. PHO7v-LITHO., WASHINGTON, D. C.

G. E. DAVIS. MINING MACHINE.

APPLICATION FILED 001. 6, 1910.

Patented Dec. 15, 1914.

6 SHEETS-SHEET 3.

Y ,ddorregfl THE NORRIS PETERS CO. PH -LITHO. 'J'vAsHlNGroN. D c

C. E. DAVIS.

MINING MACHINE. APPLIYOATION FILED 001'. s. 1910.

Patented Dec. 15, 1914.

5 SHEETS-SHEET 4.

7zve7az07 W @W 4 iiforkgfl THE NORRIS PETERS C0.. Puomurna. WASHINGIUN, D.

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CHARLES E. DAVIS, oronrcaearmlmors, assren'on roeoonr/ian namiracrunnre I COMPANY, or enrcaeo, rumors, a conronarron or ILLINOIS. A

'IJIINING-MAGHINE.

Specification of Letters Eatent. fat' fi d D 1 14 Application filed (lctobe'r '6, 1910. Serial No. 585,550!

To all whom it mag concern: I a I Be it known that I, CHARLEs E. DAVIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Mining-Machines, of which the following is a specification.

This invention relates to mining machines, and has for its object to provide a new and improved device of this description.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a planview of one form of a mining machine embodying the invention; Fig. 2 is an enlarged side elevation of the device of Fig. 1; Fig. 3 is a sectional view 1 taken on line 33 of Fig. 2; Fig. 4L is a sectional view taken on the line H of Fig. 3; Fig. 5 is a sectional view taken on the line 55 of Fig. 8; Fig. 6 is a view similar to Fig. 5 showing the parts in their inoperative is a sectional view taken on the line 7-7 of Fig. 8; Fig. 8 is a sectional view taken on the line 8-8 of Fig. .3; and

Fig. 9 is a sectional View taken on the line 9 9 of Fig. 8.

Like numerals refer to like parts throughout the several figures.

As illustrated in the drawings the machine is provided with two frames, a stationary .frame 1 resting uponsuitable supports, and

a movable frame 2 carrying the cutting chain 3. In the particular construction shown, the movable frame also carries the motor and the chain driving mechanism. In the operation of the device, the movable frame carrying the chain is fed forward against the coal so. that the chain undercuts the coal. At the front of the stationary frame is a holding ack or part 4: mounted on a rod 5 so as to be free to slide therealong. nected with the jack is a locking projection 6 adapted to fit into grooves 7 at the front of the stationary frame.

grooves and the ack is lifted to strike the Con- When the jack is in the position shown in Fig. 2 the locking projection 6 is moved out of the groove 7 so that the ack may be slipped along the rod 5 to vary its position. When the 1ock-' ing projection is opposite one of these l'oks'the jack against movement along the r0 5. i

Referring to Fig. 1, it will be noted that:

tion passes into 1 one of the grooves and V The chain and movable frame are moved forward by 'means of the gears 9 and 10 carried by the movable frame and which engageithe racks 11 and 12 fastened to. the stationary frame' The gears 9 and 10. are connected with a shaft 13 carried by the movable frame. Loosely mounted on this shaft are the gears 14 and'15, one ofwhich, the gear 15, is adapted .to move the frame forward and the otherto move said movable frame backward. A..clutch 16 is slidably mounted on the shaft and feathered thereto and isadapted to alternately engage the clutchmembers'associated with the gears 14 and 15 so as to connect either of said gears with the shaft 13. The gear 14 is connected with the gear 17 on theshaft 18. The shaft 18 is connected by a wormfgear19 and Y worm 20*with the upright sleeve 21 surrounding the stationary upright shaft 21 This sleeve is driven 'from' the motor shaft 22 (see Fig. .4) by the gears 23 and 2 1 and the beveled gears 25 and 26. An automatic safety device is provided with the motor and the chain feedi'ngflmechanism so that when the strain becomes too great the feed will be automatically stopped.

' As herein shown, the worm gear 19 is loosely mounted upon the shaft 18; Associated with the gear 19 is aring orpart fixed'tothe shaft18' (see Figs. 8 and 9).

Associated with the part 27 is a'pin 28 which projects through a projection 29 and is held in place by a set: screw 30. There is also mounted on the part 27 a, pivoted arm 31 i I movably held in place by the part 32. This movable arm, when the device is inope'ra tion, engages the pin'28 and is provided.

with a beveledface 33 which is engaged by too pin 28 andwhen the pressure reaches a predetermined amount the pin 28 is broken and the arm '31 forced out of engagement with the gear 19, thus disconnecting the. feeding mechanism from the motor.

comparatively small pin 28 may be used because this pin does not bear all of the driving pressure, part of such. pressure being transmitted tothe part 27 through the arm 31 and pin The size of the pin 28 will depend upon the incline of the beveled faces 38 and 84:. By using a small pin 28 the cost is very materially reduced, the insertion of new pins made easy and the danger of injury to themechanism by the broken pin materially reduced. The clutch 16 is ar-v ranged so as to be automatically thrown at each end of the machine so as to alternately connect gears 1% and 15 to the shaft 13. As herein shown, the clutch has a sliding ring 36 with pins'37 which are engaged by the arms 38. Connected with the arms 38 is an arm 39, the parts being mounted upon a shaft 40. The arm 39 engages stops 41 at the front and rear of the machine so as to automatically swing theclutch back and forth to alternately connect the gears ll and 15 with the shaft 13.

Some means is provided for moving the machine from place to place. As herein shown, a drum i2 is carried by a shaft 43. This drum is adapted to receive a chain 4% or other flexible power transmitting device which can be fastened to a fixed point so that when thedrum is rotated the entire machine will be moved bodily. In order to facilitate the side movement of the machine the frame is'provided with the curved engaging faces i5. As herein shown, the

shaft 48 is driven by the following mechanismr-Said shaft is provided with a gear l6 which engages a gear 47 rotatably connected with an .arm l8 movably mounted upon the shaft 43 and adapted to be moved into and out of engagement with the gear 14. The armal8 has connected with it a projection 49. The arm 48 and. form, as it were, a movablebracket carry ing the gear A7, and by means of which it is controlled. There-arepreferably two arms 18 and projections 49 between which the gear i7 is mounted (see Fig. 3). The projections 49 are connected by links 50 with a controlling part 51, the connection being made by pins52 and 53.. The controlling part 51 is provided with a stop 54: which pin 28 and part 27;

It will be noted, that by means of this construction a 'j projection 49 engages the pin 52 when the gear 47 is in mesh with gear 14 (see Fig. 5). A spring 55 is associated with the controlling part 51 and is arranged so that when the parts are in the position shown in Fig. 5 where the ears? is in mesh with the gear 1% sons to drive the shaft i3, said spring pulls said gears into mesh, the pressure being transitted from the gear 47 to the spring through the parts 49 and 50. If now, the pull in-moving the machine becomes too great so as to endanger the teeth of the gears, the gear 47, being elastically pressed toward the gear 1 1 by the spring 55, is free to slip back and let the teeth of the gears slideypast each other without driving the propelling mechanism. This construction, therefore, acts as a safety device to prevent injury to the mechanism and automatically relieve the strain. If the parts of the propelling mechanism are in the position shown in Fig. 5 and the gear i! is moved to engage the gear 1% and the teeth are not in mesh, the

gear 47 will give or be moved back so that one gear may be rotated until the teeth do come into mesh.

. When itis desired to disconnect the drum 4-2 from the motor, the gear i7 is moved out of mesh with the gear 14. This may be done by moving the controlling part '51 to the position shown in Fig. 6. This part is provided with a socket 56 for a removable shifting bar 57. When the part 51 is moved outwardly so that it and the part 50 are inclined in a direction opposite to that shownin Fig. 5, the spring 55 assists in the further movement. Said spring also holds the Fig. 6.

While the mechanism for moving the machine bodily is in operation, it is desirable to connect the stationary and moving frames together so that the gears 17 and 14: may be held in mesh. In the drawing, this is done by means of the locking part 58 which is pivotally connected to the moving frame andwhich is adapted to engage the locking projection 59 on the stationary frame (see Fig. i). The clutch 16 is moved by means of shifting bar (30 which is inserted in a hole in the shaft i0. (See Fig. 4-.) The locking part 58 is arranged so that when it is in its locking position as shown in dotted lines in ni 1-, this hole is covered by. it so that the shifting arm can not be inserted. The locking part has a hole 61 which registers with the hole in the shaft its inoperain its central or neutral position, it will be parts in the position shown in operahen the propelling mechanism by .which the machine is moved from place to place is being operated and the clutch is seen thatthe movable frame can not be connected with the motor so as to move ,it. forward until the two frames are disconnected.

I Claim, H, a

1. A mining machine comprising a stationary frame and a movable frame, a motor associated therewith, a mechanism associated with the frames for moving them relatively, a propelling inechanism forming part of the machine forinoving the entire machine from place to place, said propelling mechanism normally disconnected from the motor, and means for connecting said propelling mechanism with the motor under predetermined conditions.

2. A mining machine comprising a stationary frame and a movable frame, a motor associated therewith, a mechanism associated with the frames for'moving them relatively, a propelling mechanism for moving the entire machine from place to place, means for connectingsaid propelling mechanism with the motor under predetermined conditions, and a locking attachment for locking the stationary and movable frames together while the propelling mechanism is in operation.

3. A mining machine comprising a stationary frame and a movable frame, a motor associated therewith, a mechanism asso ciated with the frames for moving them relatively, a propelling mechanism for moving the entire machine from place to place, means for connecting said propelling mechanism with the motor under predetermined conditions, a locking attachment for looking the stationary and movable frames to gether while the propelling mechanism is in operation, and means for preventing the mechanism which moves the frames relatively from being set in operation while the two frames are locked together.

i. A mining machine comprising a stationary frame and a movable frame, a cutting chain mounted on the movable frame, a

motor also mounted on said movable frame,

operating mechanism for moving the two frames relatively, a propelling mechanism on the stationary frame by means of which the entire machine is moved from place to place, and means for connecting said pro-" pelling mechanism with said motor under predetermined conditions.

5. A mining machine comprising a stationary frame and a movable frame, a motor associated therewith, a mechanism associated with the frames for moving them relatively, a propelling mechanism for moving the entire machine from place to place, said motor adapted to be connected with said propelling mechanism under predetermined conditions, and a safety device adapted when the strain on the propelling mechanism reaches a predetermined point to automatically relieve such strain, said safety device comprising three toothed wheelsfone connected with the motor and the otherwith the propelling mechanism, the third'gear mounted upon a movable aXis. I

6. A mining machine comprising asta- 7. A mining machine comprising a sta- I tionary frame, a movable frame, a motor associated with said frames, means for con necting the motor and frames together so that said frames may be moved relatively,

a propelling mechanism adapted tomove the entire machine: from place to place comprising a drum carried by one of said frames, a shaft therefor, a gear on said shaft, a gear on the other frame operatively connected with said motor and an intermediate movably mounted connecting gear adapted to be moved to connect and disconnect said drum from said motor, said movably mounted gear elastically held in its operativeposition so that itmay give, when a predetermined pressure is applied thereto. A

8. A mining machine comprising a stationary frame, a movable frame carried by the stationary frame and adapted to move therealong, a motor adapted to move the movable frame along the stationary frame and automatic means for locking the two frames together under predetermined conditions.

9. A mining machine comprising a stationary frame, a movable frame, a motor connected with said movable frame, a cutter mounted on thefmovable frame and opera 'tively connected with said motor, a propellingmechanism for moving the entire machine from place to place mounted upon the stationary frame, and means for elastically connecting the propelling mechanism with the motor.

10. A mining machine comprising a stationary frame, a movable frame mounted upon the stationary frame and adapted to move therealong, a motor on the movable frame, propelling parts on the stationary frame, automatic means for locking the two frames together under predetermined conditions, and means for connecting the motor with the propelling parts when the frames are locked together.

11. A mining machine comprising a sta-' tionary frame, a movable frame, a motor mounted on the movable frame, a driving Signed at Chicago, Illinois, this 15th day device on the movable frame, propelling of September, A. D. 1910.

parts mounted on the stationary frame and V a movable connecting device for connecting B S DAVIS the propelling parts on the stationary frame Witnesses: V with the driving device on the movable EDNA K. REYNOLDS, frame. 7 'MINNJE'M. LINDENAU.

copies of this patent may be obtained for five cents each, by addressing the Commissioner 0 f Patents, Washington, D. G." Y 

